1. a person or thing that suppresses or restrains something
2. a protein that binds to DNA and prevents the transcription of specific genes
Usage: biology

Examples

• The dictator was known as a repressor of free speech.
• Government censorship acts as a repressor of artistic expression.
• The lac repressor controls the expression of genes in bacteria.
• Scientists studied how the repressor protein binds to the operator sequence.
• Without the repressor, the genes would be transcribed continuously.
• The repressor molecule blocks RNA polymerase from accessing the gene.